Lock.



No. 859,064. 7 PATENTED JULY 2, 1907. J. A. KITCHENS.

LOOK. APPLIOATION FILED JULY 6, 1906.

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-J. A. HITGHENS.

LOCK.

APPLIOATLON FILED JULY 5, 1906.

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.T OSEPH A. HITOHENS, OF .TOPLIN, MISSOURI.

LOCK.

Specification of Letters Patent.

Patented July 2, 1907.

Application filed July 5, 1906. Serial No. 324,849.

To all whom it may concern:

Be it known that I, JOSEPH A. HrrcHENs, a citizen of the United States,residing at Joplin, in the county of Jasper and State of Missouri, haveinvented certain new and useful Improvements in Locks; and I do declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention is an improved sliding door lock, especially adapted foruse on the doors of railway freight cars, barns and other structures,and it consists in the construction, combination, and arrangement of devices hereinafter described and claimed.

In the accompanying drawings Figure 1 is a side elevation of a slidingdoor lock embodying my improvements, showing the same locked; Fig. 2 isa similar view with the outer side of the lock casing removed, a part ofsaid casing, the key guide, and the bolts which receive the removableside of the casing being shown in transverse section, the lock boltbeing shown in locked position, the detent bar, key-operated arm,gravity-acting dog and releasing dog being indicated in an initial,locking position in dotted lines, and in a secondary position, to permitthe movement of the bolt to unlocked position, in full lines; Fig. 3 isa similar view, showing the bolt in unlocked or open position, in fulllines, and the key operated cam, in position to release the said bolt infull lines, and engaging the said bolt, in dotted lines. Fig. 4 is atransverse sectional view taken on the plane indicated by the line aa ofFig. 3.

The case 1 is here shown as of rectangular form and provided with aremovable outer side plate 2. Said side plate has on its outer side alug 3, which serves as a seal element. Carried by the said removableside plate and journaled for rotation is a key guide 4, which iscylindrical in form, extends through an opening in the removable side ofthe casing and also extends through and is journaled in an opening inthe inner side of the casing. The outer end of said key guide projectsbeyond the outer side of the removable side of the casing and isfastened to a keeper 5, which revolves with the key guide, serves as ashield to cover the keyhole 6 and is provided at one side with a lug toaline with the lug 3. The said lug of the said revoluble keeper and ofthe removable side of the casing are provided with openings throughwhich, when said lugs aline and the door is locked, as hereinafterstated, a seal wire may be passed and fastened in the usual manner. Whenthe seal wire is thus applied, the key guide is fastened so that itcannot be turned and the keeper 5 thereof serves to cover the keyhole inthe removable side of the casing. A bolt 7, which is here shown ashaving a long arm 8 and a short arm 9 at right angles thereto, has itslong arm pivotally mounted, as at 10, in the casing and extendingthrough and operating in a slot 11 in the front side of the casing. Thearm 9 extends downwardly from the outer end of the arm 8, and the innerend of said arm 8 which extends beyond the pivot 10 is beveled on itsunder side and notched in its upper side to form a point 12. A wing 13is carried by the said arm 8 to close the slot 11 when the bolt is inlocked position, as shown in Fig. 2. A spring 14 is connected to the arm8 of the bolt and serves to normally hold the bolt in locked position. Akeeper-arm 15 is secured in the lower portion of the lock case near thefront end and has its outer end projecting through and beyond the frontside of the lock case. Said keeper-arm has a slot 16 to receive thelower pointed end of the arm 9 of the pivoted bolt.

Between the arm 15 and the lower side of the lock case is alongitudinally-movable trip bar 1'7, the outer end of which projectsbeyond the front side of the lock case and has a downturned portion 18.A stop-pin 19 projects from the upper side of the said trip rod toengage the inner end of the arm 15 and coact therewith to limit theoutward movement of said trip rod. The inner end of the trip rod 17 iscurved and extended upwardly and inwardly, as shown at 20, and bears ina notch in the front side of a pivotally-mounted trigger 21 having anotch 22 to engage the inner end of the arm 8 of the pivoted bolt 7 tohold said bolt in the unlocked position thereof, shown in Fig. 3. Aspring 23 normally holds the trigger in its engaging position.

On the key guide 4 is a pivotally mounted, key-operated cam 24, whichhas a notch 25 to receive the wing of the key so that said cam may beturned by the key and with the key guide to the position required tocause said cam which engages the under side of the arm 8 of the pivotbolt to raise said pivot bolt to unlocked or releasing position. It willbe observed that the said cam 24 projects toward the front side of thelock case from the pivoted key guide upon which it is mounted, so thatit is weighted at one side and by its own gravity when released by thekey will turn from the pivot bolt to leave the latter free to be closedby the spring 14, when the said bolt is released by the operation of thetrigger 22 and the trip rod 17.

A detent bar 26 pivoted in the lock case, as at 27, has a shoulder 28 atits upper end and extends downwardly in the lock case a sufficientdistance to cause its lower end when said detent bar is in a verticalposition to bear on the upper side of the bolt 7 as shown in dottedlines in Fig. 2 and thereby prevent the bolt from being turned tounlocked position by the cam 24. A stud 29 projects from the outer sideof said detent bar and a curved trip arm 30 projects from the rear edgethereof. A gravity-acting dog 31 is pivotally mounted in the upperportion of the lock ease, as at 32. This dog engages the shoulder 28 ofthe detent bar 26 and holds said bar in its secondary position as shownin full lines in Fig. 2. The pivotally mounted bolt 7 can then be turnedto open or unlocked position by the key-operated cam 24. A retaining dog33 v has its lower end pivotally mounted in the lock case,

as at 34, and is provided 011 its outer side with a stud 35, whichoperates in a short slot 36 in a link 37, said link being pivotallyconnected to the detent bar 26 at its front end, as at 38. When thedetent bar 26 is in the position shown in full lines in Fig. 2, to clearthe pivot bolt and enable the latter to be turned to unlocked position,the retaining dog 33 has its upper end nearly in engagement with the dog31, and the trip arm 30 of the detent bar is nearly in engagement withsaid retaining dog.

A key-operated arm 39 is pivotally mounted on the key guide 4, as at 40,and has a recess 41 to clear the wing of the key and permit the key,together with the key guide and the cam 24 to be turned independently ofsaid arm when the lock bolt 7 is being turned to unlocked position. Saidrecess 41 also permits the key to be turned to a considerable extentwithout imparting motion to said arm. The latter is provided with a slot42 for the reception of the stud 29 of the detent bar. A red 43 has oneend pivoted to said keyoperated arm. Said rod operates in a guide 44, sothat it may be moved longitudinally to enable the said key-operated armto be turned pivotally, and 011 the said rod is a coiled extensilespring 45, which bears between the said guide and the said key-operatedarm, and serves to normally throw the latter inwardly and to retain itin the position shown in dotted lines in Fig. 2.

The lock will whenin use, be secured on and carried by a sliding door.The side of the car, barn or other structure against which the doorcloses will in practice be provided with a suitable keeper, such asindicated at a, or of any other suitable form for engagement by the bolt7 and will also be provided with a stop such as indicated at b, or ofany other suitable form to engage the end 18 of the trip rod 17. Whenthe lock is in a locked position, as in Figs. 1 and 2, the keeper 5 willbe secured by the seal wire such as indicated at c in Fig. 1

and the trip rod 17 will be held in its rearward position by the step b,so that the trigger 21 will be moved rearwardly against the tension ofits spring to clear the inner end of the pivoted bolt 7. The detent bar26 will be in a vertical position and with its lower end bearing on thearm 8 of the bolt 7 as shown in dotted lines in Fig. 2. Before the lockcan be operated to unlock the door, the seal must be broken and the sealwire removed. The key is then inserted in the slot in the key guide andin the keeper guide far enough to cause its wing to come in contact withthe outer side of the removable side of the lock casing, and is thenturned to cause the key guide to turn lar enough to enable the key toregister with the key hole, when the key must be pushed in far enough tocause its wing to enter the recess 41 of the arm 39. The key must thenbe turned to cause its wing to engage the shoulder forming the front endof said recess and turnthe upper end of the arm 29 rearwardly, againstthe tension of its spring 45. Said arm, by reason of the engagement ofits slot 42 by the stud 29 will turn the detent bar 26 to an inclinedposition so that its lower end will move upwardly from the pivoted bolt7, and the'dog 31. will become engaged with the shoulder 28 of saiddetent bar and lock the same in such position as shown in full lines inFig. 2. The key must then be reversely turned to cause its wing to moveto the shoulder forming the rear end of the recess 41, where it willregister with the noteh or slot in the cam 24. The key will then bepushed farther into the guide 4 and into the notch or slot of the cam,and turned in the direction required to cause said cam to raise thepivoted bolt 7 and release the arm 9 thereof from the keeper (1. As thebolt 7 nears the completion of such movement it engages the lower end ofthe detent bar 26 and turns said detent bar far enough to cause the triparm 30 thereof to engage and move the retaining dog 33, and cause saidretaining dog to engage the lower side of and act as a cam to raise andretain the gravity acting dog 31 out of engagement with the shoulder 28of the detent bar 26, as shown in Fig. 3. As the lock bolt thus causesthe detent bar to move and become cleared by the dog, said lock boltalso moves to such position as to enable the springpressed trigger toengage the inner end of its arm 8, and such trigger so engages such armand holds the locking bolt in released or unlocked position. As thespring pressed trigger thus engages the locking bolt it moves the tripbar 17 forwardly to the position shown in Fig. 3, it being assumed thatas the lock was operated to release its bolt from the detent a, the doorwas moved to open position, or partly open position, to clear the tripbar 17 from the stop b. The trigger serves to hold the bolt in releasedposition while the door is open. When the door is closed, the trip bar17 strikes the stop 1), trips the trigger from the locking bolt and thelatter descends to locking position. The spring 45 then moves the detentbar 26 to its upright position under the elevated end of the gravityacting dog 31. It will be noted that the slot 36 of the link 37 is ofsuch length that the retaining dog 31 will not be moved to inoperativeposition until the upper end of said detent bar 26 has come in contactwith the elevated end of the gravity acting dog 31. The complete lockedposition of the key operated arm, detent bar, gravity acting dog andretaining dog is indicated in dotted lines in Fig. 2.

It will be understood from the foregoing that in order to operate thelock the key must be manipulated in a peculiar way, which will tend toprevent its use by an unauthorized person.

From the foregoing description, taken in connection with. theaccompanying drawings, the construction and operation of the inventionwill be readily understood without requiring a more extendedexplanation.

Various changes in the form, proportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of this invention, as defined by theappended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters-Patent, is:

1. A lock having its case provided with a fixed seal element and akeyhole, and a movable seal element also having a keyhole to registerwith that of the lock case, substantially as described.

2. A lock having its ,case provided with a fixed keyhole,

a revoluble key guide having a keeper to cover the fixed keyhole, saidkeeper being revoluble with the key guide and provided with a keyhole tobe moved into and out of register with that of the fixed keyhole, saidcase and said revoluble keeper each having a seal element, substantiallyas described.

3. In a lock, in combination with a casing, a pivoted locking bolt, aspring to move said bolt to locking position, a trigger to secure saidbolt in unlocking position, a pivoted detent bar to secure said bolt inlocking position, a key-operated arm, connected to said detent, to movethe latter and cause the same to release the locking bolt, a dog tosecure the detent bar when the latter is in the position required torelease the locking bolt, means to move the bolt to unlocking position,means actuated by the locking bolt when the latter is being moved tounloclr ing position to disengage the dog from the detent bar to releasethe latter. and means to disengage the trigger from the locking bolt andhence cause the latter to be moved to locking position by its spring.

4. In a lock, in combination with a casing, a pivoted locking bolt, aspring to move said bolt to locking position, a trigger to secure saidbolt in unlocking; position, a pivoted detent bar to secure said bolt inlocking position, a keyoperated arm, connected to said detent, to movethe latter and cause the same to release the locking bolt, a dog tosecure the detent bar when the latter is in the position required torelease the locking bolt, a retaining; dog, operated by the detent barto retain the first-mentioned dog above the detent bar when the saiddetent bar is returned to locking position, means to move such lockingbolt to unlocking position, and means to disengage the trigger from thelocking bolt and hence cause the latter to be moved to locking positionby the spring.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JOSEPH A. I-IITCI-IENS. Witnesses BENJAMIN BALLENGER, J. C. RIEKETT.

